Motor mounting



' Oct. 12, 1943. E. H. PIRQN 2,331,623

MOTOR MOUNTING Fil'ed Dec. 26, 1940 MQI BY Ahab Patented Oct. 12, 1943 PAT E NT OFFICE MOTOR MOUNTING Emil H. Piron, New York, N. Y., assignor to Trans} it Research Corporation, New York, N. Y., a

corporation of New York Application December 26, 1940, Serial No. 371,667

4 Claims.

This invention relates to motor mounting means and has for its primary object to provide an improved device of this character for mounting electric motors on the trucks of street railway vehicles.

Trucks of the type here contemplated have two axles and a frame mounted thereon by springing means. A motor is provided for driving each axle individually, and these motors are mounted upon the sprung frame between the axles and are connected to respective axles by flexible couplings and shafts. The swing bolster which supports the car body on the frame is also disposed between the axles of the truck, and the motors are suspended beneath cross frame members on opposite sides of the swing bolster with their drive shafts extending beneath or through openings in the swing bolster to the remote axles. The main object of this invention is to provide means for suspending the motors beneath the cross frame members and, more particularly, means which enables easy removal of one motor or its drive shaft without interference from the .other motor.

Another object is to provide a motor mounting comprising a U-shaped strap suspended beneath a cross frame member by removable pins. The motor is suspended from the cross frame member by the U strap and is prevented from moving rotatively or otherwise relative to the strap by a pair of angularly related set-screws mounted in the cross frame member. The set screws, when loosened, permit movement of the motor relative to the strap and cross member while it is held suspended by the strap members, thus enabling correct positioning of the motor without requiring use of a crane, etc. The motor may be readily removed by removing the pins which support the strap.

Other objects and advantages will become more fully apparent as reference is had to the accompanying drawing wherein my invention is illustrated, and in which Fig. 1 is a plan view of a street railway truck, and

Fig. 2 is a view taken approximately on the line 22 of Fig. 1.

More specifically I and 2 designate axle housings containing axles (not shown) for driving the wheels 3 and having enlarged portions 4 for driving the axles from respective propeller shafts 5 and 6. The propeller shafts 5 and 6 have flexible couplings I and are operated respectively by electric motors 8 and 9. Mounted upon the axle housings I and 2 are rubber springs I0 which 55 members II as indicated at I2.

are connected to longitudinally extending frame The longitudinal frame members are rigidly connected together by crossframe members l3 between which the usual swing bolster I4 is mounted.

The motor mounting may be more readily understood with reference to Fig. 2. It comprises a U-shaped metal strap I5 formed with a pair of closed loops l6 which receive pins I! supported by ears l8 depending from the cross frame member I3. As there is practically no tendency for the pins IT to shift axially they are retained in place by cotter pins [-9, which may be readily removed to enable removal of the pin ll.

Two set screws 20 are mounted in spaced lugs 2| on the cross frame member I3 with their axes converging in a direction toward the center of the motor. The axes of the set screws are illustrated as being disposed radially with respect to the motor in which case they converge at the exact center of the motor which'although preferred is not, of course, essential. With the motor suspended from the frame member l3 by the strap I5 as shown in Fig. 2 and the screws 20 tightened into engagement with the motor the motor is firmly held against movement with respect to the frame member. Upon loosening of the screws 20 the motor becomes free to shift and thus, for example, enables removal of its drive shaft without removing the cross frame member. If complete removal of the motor is desired, this may be accomplished by first loosening the screws 20 and thereafter removing one or both of the pins IT.

The driving torque applied at the wheels must, of course, react against the motor housing and tend to rotate it. For this reason, it is desirable to provide positive meansfor resisting rotation of the motor housing rather than to rely upon frictional clamping means. Fig. 2 illustrates a simple form of means for positively preventing rotation of the motor which comprises upstanding lugs 22 on the strap member I 5 which extend into notches or grooves 23 in the motor housing. When the lugs are present the set screws 20 function to hold the lugs in their grooves and constitute means for holding the positive rotation preventing means in operative relation. The lugs as shown prevent only rotative movement because they are disposed in longitudinal grooves. Longitudinal movement may be prevented by forming notches rather than grooves. As shown, however, a pin 24 secured to the strap l5 extends into a hole 25 to prevent longitudinal movement.

Although a specific embodiment of the invention has been illustrated and described, it will be understood that various changes may be made within the scope of the appended claims without departing from the spirit of the invention, and such changes are contemplated.

, What is claimed is:

1. In combination, a truck frame member, a substantially U-shaped member rigidly depending from the frame member, a motor loosely received in said U-shaped member, two pairs of set screws with the pairs mounted on opposite sides of said frame member, the set screws of each pair being disposed in planes between the planes of the arms of the U-shaped frame member and having their axes converging toward the center of the motor, said set screws being adapted to be moved into pressure contact with said motor, said motor being axially rockable and said set screws being individually adjustable to maintain the motor in a selected position with respect to the horizontal.

2. In combination, a truck frame member, a substantially U-shaped member, detachable means rigidly attaching the two arms of-the U- shaped membertothe frame member, a motor loosely received in said U-shaped membentwo pairs of set screws withthe pairs mounted on opposite sides of said frame member, the set screws of each pair being disposed in planes between the planes of the arms of the U-shaped frame member and having'their axes converging toward the center of the motor, said set screws being adapted to be moved into pressure contact with said motor, means located between said U- shaped member and said motor retaining said motor against rotation with respect to said U- shaped member and means retaining said motor against longitudinal displacement with respect to said U-shaped member.

3. In combination, a truck frame member, spaced pairs of brackets depending from said frame member, a substantially U-shaped member having loops on the ends of the arms thereof, removable pins retaining respective loops between respective pairs of brackets, a motor loosely received in said U-shaped member, and set screws on said frame member and having pressure contact with said motor between the arms of the U- shaped member.

4. In combination, a truck frame member, a substantially U-shaped member having its two arms rigidly connected to said frame member, a motor loosely received in said U-shaped member, said motor andsaid U-shaped member having interlocking movement preventing means, and a lockingelement on said frame member for holding said movement preventing means in interlocking relation, said motor beingadjustable by movementsthrough an arc in a plane containing the axis thereof prior to tightening of said locking element.

EMIL H. PIRON. 

